I loved HS to xp in, solo'd there on my Necro and my cleric spent most of her 50s and dinged 60 in that zone on live!
You should be able to solo at the zone of HS in or drop down and solo there. I did both with my necro around your level.
As for COM, right now on P99 I keep my cleric bound at the Moat camp back against the wall on the little ledge there (don't want to be logging into a reaver fight!). It's safe enough, no mobs wander there, you just either want to get an IVU pot or hope there's no undead mobs along the way when you want to move on to your camp
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You may be able to do some of the zone in/out and in front of the "house" (or whatever you call it) mobs in chardok as well, but I think they might have more HPs, I haven't been to chardok since live.
If you're just having trouble finding groups at all, feel free to poke me if you see me in game. I'm usually just duoing with my monk guildie and we let whoever join, we're not snobby about classes or anything! He's 53 and I'm almost 52